If the static energy of HESS is extended to the energy source of rotary inertia, the flexible virtual synchronous coupling mode will make the transient stability of power electronic power system more controllable.
Advances in the fields of renewable generation, electric vehicles, and energy storage systems push forward the research on ac-dc and dc-ac grid-tied power converters.
Design of Hybrid-Storage-Based Virtual Synchronous Machine With Energy Recovery Control Considering Energy Consumed in Inertial and Damping Support Published in: IEEE Transactions on Power Electronics ( Volume: 37, Issue: 3, March 2022 )
In this paper, the Virtual Synchronous Generator (VSG) based on battery/supercapacitor Hybrid Energy Storage System (HESS) is proposed to handle the stochastic power output of Photovoltaic (PV). First, the power allocation methods for HESS and its comparison are illustrated.
To address this issue, this paper presents a photovoltaic energy storage power generation system incorporating an adaptive parameter VSG control strategy. Through the equivalent small-signal model, the impact of inertia on system frequency and power is analyzed.
A hybrid energy storage system is connected to the system to improve the stability of the proposed microgrid including a lead-acid battery with a supercapacitor (SC).
The virtual shaft control strategy of the hybrid energy storage device is proposed for both frequency support and oscillation suppression.
The research focuses on a hybrid photovoltaic-storage system, which combines photovoltaic panels, an energy storage unit, and a bidirectional DC/DC converter. To ensure frequency and voltage stability, the system employs a virtual synchronous generator (VSG) control approach.
The power of photovoltaic power generation is prone to fluctuate and the inertia of the system is reduced, this paper proposes a hybrid energy storage control strategy of a photovoltaic DC microgrid based on the virtual synchronous generator (VSG).
By regulating power converters as virtual synchronous generators (VSGs), they can exhibit similar frequency dynamic response. However, unlike synchronous generators, power converters are incapable of absorbing/delivering any kinetic energy, which necessitates extra energy storage systems (ESSs).
